Question

我在UISegmentControl上添加了自定义徽章。在Xcode 4.0.2 SDK 4.3它的工作正常。但是在Xcode 4.2 SDK 5.0中，当选择其他项目时，不会显示自定义徽章。我不知道为什么会这样？我正在使用IOS 4.3 Xcode 4.0.2的以下代码：

- (void)viewDidLoad {
    [super viewDidLoad];

    super.tableView.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"wallpaper.png"]];
    NSLog(@"Root View Loaded");

    segmentedControl = [[UISegmentedControl alloc] initWithItems:
                                            [NSArray arrayWithObjects:
                                             @"Home",@"Surveys",@"Results",@"Create",@"Settings",
                                             nil]];
    [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
    segmentedControl.frame = CGRectMake(0, 0, 310, 40);
    segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
    segmentedControl.tintColor = [UIColor darkGrayColor];
    segmentedControl.momentary = NO;
    segmentedControl.highlighted = YES;

    segmentedControl.selectedSegmentIndex = 0;

    UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];

    NSArray *segmentBarArray = [NSArray arrayWithObjects:
                                segmentBarItem,nil];

    [[self appDelegate] setSegmentedControl:segmentedControl];
    [[self appDelegate] setSegmentBarArray:segmentBarArray];

    [self setToolbarItems:[[self appDelegate] segmentBarArray] animated:NO];

    [[self navigationController] setToolbarHidden:NO animated:YES];
    [self.navigationItem setHidesBackButton:YES animated:YES];
    self.navigationController.toolbar.tintColor = [UIColor blackColor];

    int surveycount = [[self appDelegate] getUnreadSurveyCount];
    surveyCountBadge = [CustomBadge customBadgeWithString:[NSString stringWithFormat:@"%d",surveycount]];
    [surveyCountBadge setFrame:CGRectMake(105, -10, surveyCountBadge.frame.size.width, surveyCountBadge.frame.size.height)];

    [segmentedControl addSubview:surveyCountBadge];    
    if (surveycount == 0) {
        [surveyCountBadge setHidden:YES];
    }else{
        [surveyCountBadge setHidden:NO];
    }
}
-(void)segmentAction:(id) sender{
    UISegmentedControl *segmentedControl = (UISegmentedControl *)sender;
    NSLog(@"selected index is %d",segmentedControl.selectedSegmentIndex);

    if (segmentedControl.selectedSegmentIndex == 0) {
        [self.navigationController popToRootViewControllerAnimated:YES];
    } else if(segmentedControl.selectedSegmentIndex  ==1){
        surveyForMeViewController = [[SurveyForMeView alloc] initWithNibName:@"SurveyForMeView" bundle:nil];
        [self.navigationController pushViewController:surveyForMeViewController animated:YES];

    } else if(segmentedControl.selectedSegmentIndex  ==2){
        resultViewController = [[ResultView alloc] initWithNibName:@"ResultView" bundle:nil];
        [self.navigationController pushViewController:resultViewController animated:YES];

    } else if (segmentedControl.selectedSegmentIndex ==3) {
        newSurveyViewController = [[NewSurveyView alloc] initWithNibName:@"NewSurveyView" bundle:nil];
        [self.navigationController pushViewController:newSurveyViewController animated:YES];

    } else if (segmentedControl.selectedSegmentIndex ==4) {
        settingsViewControlle = [[SettingsView alloc] initWithNibName:@"SettingsView" bundle:nil];
        [self.navigationController pushViewController:settingsViewControlle animated:YES];
    }


}

我应该在此提及其他任何事情吗？

Answer 1

您正在为segmentedControl添加子视图。由于您不知道系统在选择其他项目时如何重绘控件，您无法说明您的视图是否会被删除。让control，button或segmentedControl完成其工作，如果要添加徽章，请将其添加为其父级的子视图。

[surveyCountBadge setFrame:CGRectMake(105.0f+segmentedControl.frame.origin.x,
   -10.0f+sementedControl.frame.origin.y, surveyCountBadge.frame.size.width, 
    surveyCountBadge.frame.size.height)];

[[segmentedControl superView] addSubview: surveyCountBadge];

当UISegmentedcontrol项目发生变化时，为什么它会在IOS 5中隐藏自定义徽章？

1 个答案: